Essilor International (compagnie Generale D'optique)

Essilor International (compagnie General D'optique)

Dac International Inc.

Steven L Reid

John R Keller

Laurent Marcepoil

Eric Comte

Maggy Perrier

Joseph K Bond

James W Drain

Joseph Kim Bond

A polishing machine for optical elements, comprising:&#x2014;a spindle arranged to rotationally drive an optical element;&#x2014;a polishing tool mobile relative to the spindle; wherein the polishing machine further comprises a platform mounted on top of a work chamber, the work chamber comprising the spindle, and the platform holding a body on which is mounted the polishing tool.

Polishing machine comprising a work chamber and a platform

A polishing machine for optical elements includes: &#x2014;a spindle arranged to rotationally drive an optical element; &#x2014;a polishing tool mobile relative to the spindle; &#x2014;a front face provided with a door enabling the access to the spindle and to the polishing tool. The polishing tool is mounted on a body which is rotationally mounted on sliding members by way of a first axis, the sliding members being substantially perpendicular to the front face.

Polishing machine comprising sliding means transverse to the front face

A polishing machine for optical elements, comprising:

A system and method for reducing reaction forces induced in a machine frame by an oscillating tool employs a counterforce assembly which is driven to move along linear slides mounted to the machine frame. The counterforce assembly is driven with a drive signal derived from two signals: a first signal which is proportional to the acceleration of the tool, and a second signal which is directly proportional to the velocity of the oscillating tool. By properly-adjusting the acceleration and velocity components of the drive signal, the magnitude of the reaction forces induced in the machine frame by the oscillating tool can be substantially reduced. The counterforce assembly preferably includes a centering means which prevents it from moving to either end of the slide. An accelerometer is preferably mounted to the machine frame to sense its vibration, with the accelerometer output used to adjust the counterforce assembly's drive electronics to reduce vibration to a minimum.

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Carpinteria, CA, United States of America

Steven L Reid